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Create a class which generates student merit list according to the percentage and total marks of three subjects

Submitted by Rahimv on Mon, 08/23/2010 - 18:38

/*
 * Create a class which generates student merit list. Get number of students to enter followed by
 * details of each student and then display the student merit list according to the percentage and
 * total marks.
 */
 
import java.io.DataInputStream;
 
class Student
{
 int sno;
 String sname;
 int m[] = new int[3];
 int total;
 float percentage;
 
 void getdata()
 {
  DataInputStream in = new DataInputStream(System.in);
  
  try
  {
   System.out.print("Enter Student No. ");
   sno = Integer.parseInt(in.readLine());
   
   System.out.print("Enter Student Name. ");
   sname = in.readLine();
   
   System.out.print("Marks of Subject # 1: ");
   m[0] = Integer.parseInt(in.readLine());
   
   System.out.print("Marks of Subject # 2: ");
   m[1] = Integer.parseInt(in.readLine());
   
   System.out.print("Marks of Subject # 3: ");
   m[2] = Integer.parseInt(in.readLine());
   
  }
  catch(Exception e)
  {
   System.out.println("IO Exception  " + e);
   System.exit(1);
  }
  
 }
 
 int getTotal()
 {
  return(m[0] + m[1] + m[2]);
 }
 
 float getPercentage()
 {
  return(getTotal()/3.0f);
 }
 
 void printStudent()
 {
  System.out.println("Student No. : "+ sno);
  System.out.println("Student Name. : "+ sname);
  System.out.println("Subject # 1 : "+ m[0]);
  System.out.println("Subject # 2 : "+ m[1]);
  System.out.println("Subject # 3 : "+ m[2]);
 }
 
}
 
class StudentMeritList
{
 public static void main(String args[])
 {
  int i,j, n = 0;
  Student ts = new Student();
 
  DataInputStream in = new DataInputStream(System.in);
  try
  {
   System.out.print("How Many Students? ");
   n = Integer.parseInt(in.readLine());
  }
  catch(Exception e)
  { 
   System.out.println("Exception " + e );
   System.exit(1);
  }
  
  Student s[] = new Student[n];
  
  for(i=0; i<n; i++)
  {
   s[i] = new Student();
   s[i].getdata();
  }
  
  for(i=0; i<n-1; i++)
  {
   for(j=i+1; j<n; j++)
   {
    if(s[i].getPercentage() < s[j].getPercentage())
    {
     ts = s[i];
     s[i] = s[j];
     s[j] = ts;
    }
   }
  }
  System.out.println("\t\tStudents Merit List");
  System.out.println("\t\t===============");
 
  for(i=0; i<n; i++)
  {
   s[i].printStudent();
   System.out.println("Total Marks: " + s[i].getTotal());
   System.out.println("Percentage: " + s[i].getPercentage());
  }
 }
}
 
 